Portable CO2 Detector | Handheld Indoor Air Quality Monitor | 3-in-1 CO Carbon Dioxide Temperature Humidity Sensor | Rechargeable | Compact for Home Car RV | 85x51x17mm Features: 3-in-1 Functionality: This multifunctional CO detector combines three functions into one compact and portable device. It's for home, tent, car or RV use. High Precision Carbon Monoxide Sensor: Equipped with an advanced electrochemical CO sensor, this detector delivers accurate and readings of CO concentrations. Visible Quality: Monitors carbon dioxide and concentration, temperature, and humidity in rooms and classrooms, offices, and other spaces. Compact size, small, lightweight and convenient, you can take it anywhere The carbon dioxide detector detects indoor stains, chemicals and colorless and odorless carbon dioxide that can harm the human body. Product Description: Working humidity: 0-95% Working temperature: -20—60 ℃ Battery capacity: 1000HMA, with power indicator Battery model: 603040 Charging interface: TYPE-C 3.7V Product size: 85*51*17mm Packing List: 1 xCO2 Meter